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Elza [17]
2 years ago
7

The equation y=models the savings.

Mathematics
1 answer:
larisa86 [58]2 years ago
5 0

Answer:

Step-by-step explanation:

450

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The answer for that question is 1 3/5
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3 years ago
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The radius of a cone is decreasing at a constant rate of 7 inches per second, and the volume is decreasing at a rate of 948 cubi
nadezda [96]

Answer:

Step-by-step explanation:

We have volume of cone as

V=\frac{1}{3} \pi r^2 h

and for a cone always r/h = constant

Given that r' = rate of change of radius = -7 inches/sec

(Negative sign because decresing)

V' =- 948 in^3/sec

Radius = 99 inches and volume = 525 inches

Height at this instant = \frac{525}{\frac{1}{3} \pi (99)^2} \\=\frac{0.1607}{\pi}

Let us differentiate the volume equation with respect to t using product rule

V=\frac{1}{3} \pi r^2 h\\V' = \frac{1}{3} \pi[2rhr'+r^2 h']\\-948 = \frac{1}{3} \pi[2(99)(-7)(\frac{0.1607}{\pi})+99^2 h']\\

-948 = \frac{1}{3} \pi[2(99)(-7)(\frac{0.1607}{\pi})+99^2 h']\\-948 = 33(3.14)(-2.25/3.14  + 99 h')\\-9.149=-0.72+99h'\\-8.429 = 99h'\\h' = 0.08514

Rate of change of height = 0.08514 in/sec

8 0
3 years ago
Hey guys help me out please. Need it now
oksian1 [2.3K]

Answer:

yes

Step-by-step explanation:

4 0
3 years ago
What is the degree of an angle in a regular heptagon
Ronch [10]
There is 360 degrees in a full revolution.
There are 7 sides/edges/vertices in a heptagon.
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The degree of an angle in a regular heptagon is thus 51.42857143 degrees. 
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3 years ago
8x - 1 - 9x I don’t understand
Ivan
-x-1
all you do is subtract 9x from 8x.

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3 years ago
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